The Wacker Neuson Stud is a genuine OEM component designed for the E1250 and HSH380 series hydronic surface heaters. This stud is a direct factory replacement sourced to the original specification, covering a wide range of E1250 and HSH380 configurations including Standard, Basic, and Premium variants running on LP/NG, Natural Gas/Propane, and Diesel. Whether you're servicing an E1250S, E1250B, E1250P, HSH380S, or HSH380B unit, part number is the correct OEM replacement to restore your machine to proper working order. As a genuine Wacker Neuson part, the Stud is manufactured to the same standards as the original, ensuring a proper fit within the assembly it supports.
Key Features
- Genuine OEM Construction: — Manufactured to original Wacker Neuson tolerances, ensuring correct thread pitch, shank diameter, and load rating specific to hydronic heater assemblies.
- Drop-In Replacement: — Matches the original mounting pattern and thread specification, allowing straightforward installation without reworking the surrounding assembly.
- Broad HSH and E1250 Fitment: — Confirmed compatibility across E1250S, E1250B, and E1250P models as well as HSH380S and HSH380B units in LP/NG, Natural Gas/Propane, and Diesel configurations.
- Structural Integrity Restored: — A properly fitted stud maintains secure component fastening within the heater assembly; a worn, stripped, or broken stud can compromise clamping force and lead to component movement or fluid leaks.
- Fuel-System Adjacent Safety: — In hydronic heater applications, secure fastening near fuel and fluid circuits is critical; using the correct OEM stud helps maintain the integrity of those connections.
A stud is a headless threaded fastener that remains permanently fixed in one component, providing a stable threaded post onto which a nut can be torqued to secure a mating part. In hydronic surface heaters like the E1250 and HSH380 series, studs are used to fasten critical assemblies — such as heat exchanger panels, burner housings, or fluid manifold covers — where a through-bolt would be impractical or where repeated service access is required. When a stud becomes stripped, corroded, or broken, the clamping force on that joint is lost, which can allow panels to shift, gaskets to fail, or fluid connections to weep — making prompt replacement essential to keeping the heater operating safely and efficiently.
Part Details
| Part Number | 5200021091 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Stud |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| E1250S | E1250S | 5200012355, 5200012354 |
| E12540B | E1250B | 5200012353, 5200007613 |
| HSH380s | HSH 380S | 5100054643 |
| E 1250P Hydronic Heater, Premium, Diesel | E1250P | 5200012357, 5200012356 |
| HSH380S-Diesel, with Generator | HSH380S | 5200012371, 5200012370 |
| HSH380B-Diesel, without generator | HSH380B | 5200012359, 5200007614 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
